<s>
The	O
corresponding	O
microstructure	O
of	O
the	O
cell	O
is	O
computed	O
by	O
interpolation	B-Algorithm
.	O
</s>
<s>
During	O
the	O
pre-processing	O
planning	O
a	O
microstructure	O
design	O
(	O
3D	O
geometric	O
modelling	O
by	O
the	O
use	O
of	O
CAD	B-Application
modelling	O
system	O
)	O
and	O
properties	O
are	O
modelled	O
(	O
factors	O
and	O
parameters	O
)	O
.	O
</s>
<s>
3D	O
geometry	O
is	O
modeled	O
via	O
computer-aided	B-Application
design	I-Application
(	O
CAD	B-Application
)	O
,	O
including	O
numerical	O
control	O
stress	O
analysis	O
and	O
finite	B-Application
element	I-Application
method	I-Application
(	O
FEM	B-Application
)	O
.	O
</s>
<s>
An	O
optimization	O
method	O
for	O
sampling	O
structures	O
is	O
used	O
that	O
exhibits	O
the	O
range	O
of	O
desired	O
behaviors	O
but	O
keeps	O
the	O
structures	O
sufficiently	O
similar	O
to	O
allow	O
interpolation	B-Algorithm
.	O
</s>
<s>
As	O
its	O
name	O
implies	O
,	O
CAD	B-Application
errors	O
,	O
models	O
and	O
non-robustness	O
of	O
the	O
CAD-STL	O
interface	O
are	O
being	O
checked	O
.	O
</s>
<s>
Shape	O
optimization	O
is	O
based	O
on	O
the	O
thickness	O
of	O
the	O
deposited	O
material	O
to	O
reduce	O
the	O
stress	O
concentration	O
by	O
first	O
accurately	O
representing	O
shells	O
in	O
the	O
shape	O
of	O
conic	O
by	O
the	O
use	O
of	O
the	O
CAD	B-Application
,	O
and	O
then	O
derived	O
by	O
sensitivity	O
analysis	O
the	O
stress	O
required	O
.	O
</s>
<s>
First	O
,	O
working	O
with	O
microstructures	O
corresponding	O
to	O
blocks	O
of	O
voxels	B-Algorithm
instead	O
of	O
individual	O
voxels	B-Algorithm
directly	O
.	O
</s>
